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Okay . . . well, the enlargement will have to be your secret---I can't figure it out. But I see the ramp in both plans. However, this isn't what was built, is it; the stairs shown in the
Monograph plan are presumably the replacement.

If you can enlarge those colored plans, copy them for posterity; I haven't seen that version of the design elsewhere.

You just click on the image.
Im on a Mac, when my cursor hovers over the image
a magnifying glass with a plus sign appears.
It lets me enlarge 2 times.
It's like the Visions of Wright site.
But I did copy them and will send to you.
I've never seen this version of the project either.
Pretty cool.

So in the 1956 shot by Joe Price the "fins" running down the left side of the Tower are stair landings to the stairs.
The ones Rood walked down.
Not realized this before but they are open to the air.
Literally a "fire escape" like Rood said.

Notice on the drawing that the ramps at the top end are scribbled out, as if FLW was not satisfied. He then altered the entire system to what is shown in plan, with those angled steps that are a bit awkward to use.

There is one photo of the interior of the stairs in FLW's "The Story of the Tower" on page 132, which is the only such photo I have ever found.